Numbers whose base-10 representation has the same nonzero number of 6's and 9's.

Terms

a(0) =69a(1) =96a(2) =169a(3) =196a(4) =269a(5) =296a(6) =369a(7) =396a(8) =469a(9) =496a(10) =569a(11) =596a(12) =609a(13) =619a(14) =629a(15) =639a(16) =649a(17) =659a(18) =679a(19) =689a(20) =690a(21) =691a(22) =692a(23) =693a(24) =694a(25) =695a(26) =697a(27) =698a(28) =769a(29) =796